host based 128 bit arithmetics

• update for sdk version 1.1.0 - host based 128 bit arithmetics
• example contracts that need 128 bit arithmetics now use arithm128.ts

P 21 & stellar-cli v21.0.0 support

• update for protocol 21
• update for stellar-cli v21.0.0
• update for as-sorban sdk 1.0.1

SDK 1.0.0 support

• update docs and examples
• support for SDK 1.0.0

SDK 0.4.0 support

Add support for SDK v. 0.4.0 and Soroban 20.0.2

SDK 0.3.0 support

• add support for sdk 0.3.0
• improve code, test and docs
• optimize code

Support for SDK v0.2.5 - Soroban prev. 11

• update for sdk v. 0.2.5 and soroban prev. 11

support for sdk 0.2.4

update for sdk 0.2.4

Support for sdk 0.2.3

• supports soroban preview 10

support for sdk 0.2.1

• update for sdk 0.2.1
• add liquidity pool example

add multi swap & single offer sale examples

add multi swap example
add single offer sale example
update for sdk 0.1.9